http://seattletimes.nwsource.com/html/localnews/2009822764_brightwater08m.html
More of the story
Not too far from where I live, they are digging and laying a sewer line to the Sound 300 feet deep.
They have four machines boring the soft dirt tunnels for the 17.5 feet sewer pipe.
Two of the machines have broken, requiring divers to go down and try to weld them underwater.
They can work for two hours and then spend six to seven hours decompressing.
And I thought crawling under houses was bad on the body.
Brightwater's 13-mile tunnel pdf
Brightwater's tunnel-boring machines
By Jack Broom
Seattle Times
Helene and Rainier are huge, expensive and slow-moving, but they certainly aren't boring.
And that's precisely the problem.
"Helene" and "Rainier" are the nicknames of two 17.5-foot-diameter, German-made machines that are supposed to be hard at work boring sections of a 13-mile tunnel to take wastewater to Puget Sound from the Brightwater sewage-treatment plant King County is building north of Woodinville.
More of the story
Not too far from where I live, they are digging and laying a sewer line to the Sound 300 feet deep.
They have four machines boring the soft dirt tunnels for the 17.5 feet sewer pipe.
Two of the machines have broken, requiring divers to go down and try to weld them underwater.
They can work for two hours and then spend six to seven hours decompressing.
And I thought crawling under houses was bad on the body.
Brightwater's 13-mile tunnel pdf
Brightwater's tunnel-boring machines
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